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25 August 1999 <br /> AGE-NC Project No 98-0448 <br /> Page 7 of 10 <br /> physicochemical laboratory analysis The results of the analysis indicated that selected microbial <br />' enumeration (hydrocarbon-degrading microorganisms) were detected at 1 CFU (colony forming <br /> units)per gram The laboratory indicated that these physicochemical conditions at the site were well <br /> within the range necessary to support microbial growth and bioremedial activity The analysis also <br /> Iindicated that the percentage of microbial btodegraders were significantly lower in the EWl-25 soil <br /> sample, possibly due to the presence of alternative carbon sources (abundance of organic debris) <br /> Copies of the microbial enumeration and physicochemical laboratory reports are included with <br /> Appendix D <br />' 3 5 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br />' Nine ground water monitoring well samples were submitted to a DHS-certified laboratory for <br /> analysts of TPH-g, BTEX, MTBE, TAME, DIPS, ETBE and TBA to June 1999 TPH-g was <br /> detected to ground water samples collected from wells MW-1,MW-2,MW-4A,MW-4B,MW-6 and <br />' MW-8 at concentrations between 86 micrograms per liter (µg/1) and 65,000 ug/l, however the <br /> laboratory reported unmodified or weakly modified gasoline was significant or heavier gasoline <br /> range compounds were significant <br /> Various BTEX compounds were detected in ground water samples collected from wells MW-1 <br />' through MW-8 at concentrations between 0 82 Mcg/l and 16,000 ,ug/l, the greatest benzene <br /> concentration was detected to the ground water sample collected from MW-4B at a concentration <br /> of 4,900 ,ug/1 <br />' MTBE was detected to ground water samples collected from wells MW-1, MW-4B and MW-8 at <br /> concentrations ranging as high as 41 µgll DIPE was detected to ground water samples collected <br />' from MW-1 and MW-413 at concentrations as high as 10 µg/1, TBA was detected to ground water <br /> samples collected from MW-1,MW-6 and MW-8 at concentrations as high as 7µg/1 No other fuel- <br /> oxygenate analytes were detected above laboratory reporting limits <br />' The analytical results of quarterly ground water samples are summarized to Table 3 The laboratory <br /> reports (McCampbell Analytical Inc Lab I D No 14174 through 14182) and chain-of-custody <br /> forms are included in Appendix E <br />' 4.0. DISCUSSION AND CONCLUSIONS <br /> I <br /> Based on the results of soil sampling, ground water monttonng and ground water sampling activities <br /> performed to June 1999, AGE concludes <br /> • Advanced GeoEnviron mental,Inc <br /> I ' <br />